Thank you so much for your reply.
I'm a bit curious about whether it does pose at least a little risk when there is semen in your mouth and/or when you swallow. I can see if semen does not come into contact with the mouth that there would be no risk but when it does, the mucus membrane of of the giver's mouth and stomach is exposed to infectious (assuming the virus is present) bodily fluids.
Also, what if a partner IS HIV positive? Is unprotected oral sex with ejaculation still safe to perform? I guess I'm just trying to understand and become educated on the matter.
Thank you so very much for your time and answer